Figure 1
Raytracing models (Shadow software; Sanchez del Rio et al., 2011) for 1:1 (TES) versus 2:1 toroidal focusing. Beam footprint at primary focus, showing substantial aberration for 1:1 and superiority of the 2:1 focus at that location (top). Corresponding microbeam focus at sample position with SSA adjusted to pass 50% of photons (bottom). |